单词	sealed-beam
释义	sealed-beam adjective ˈsēl(d)-ˈbēm  : being an electric lamp with a prefocused reflector and lens sealed in the lamp vacuum Word History First Known Use 1939, in the meaning defined above
随便看	aleksandrovsk aleksandrovsk-grushevski Alemanni Alemannic Alembert, d' alembic alembicate alembicated alembication alembics alembroth Alemán Alemán Valdés alencons alençon Alençon diamond aleph aleph-bet aleph-null alephs alepidote alepisauri Alepisaurus alepisauruses alepisaurusses

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